Chris Hemsworth has revealed that his niece has a toy doll of his character from Thor, and won't stop playing with it.

The Australian actor, who plays the title character in Kenneth Branagh's new Marvel movie, has had a talking plastic action figure made of him.

He told moviefone:"I was talking with my older brother the other day and his daughter was running around the house with a Thor action figure; he wanted to pull the batteries out of it because she keeps pressing the button and making it speak, 'I am Thor!' or, 'The mighty Mjolnir!' It does nothing but make me laugh, it's great."

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Hemsworth also said that kissing Natalie Portman in the film was fairly unromantic due to the amount of people watching.

"It's all rather intimidating and fairly unromantic," he explained. "You've got 50 people around you and cameras on. It ends up being quite humorous more than anything. You feel like little kids; you've just got to have a laugh and get on with it."